E450 + debian

[nick]

Hi, I've just burned the newest sparc debian images, and when I try to
boot them (boot cdrom, enter at the silo prompt) I get "UGH: property acd
was 8, need < 1".  Did I burn a bad cd, is there some param I forgot, or
is this an actual bug?
        Thanks
                Nick
PS I'm not subscribed, so please cc me.